A vertical assembly method for steel bridge components

Abstract

The present invention provides a vertical assembly method for steel bridge components, comprising: S100, after pre-assembling a first beam and a second beam into a beam assembly on the ground, hoisting the beam assembly to the bridge deck installation position for rough positioning; S200, after precisely trimming the allowance at the lower port of the beam assembly based on the rough positioning assembly data, assembling the beam assembly in place with the bridge deck support; S300, pre-assembling the third beam and the beam assembly in advance on the ground; S400, hoisting the third beam to the bridge deck and assembling it in place with the beam assembly and the bridge deck support. The vertical assembly method for steel bridge components of the present application can efficiently and safely complete the bridge assembly work through pre-assembly technology and by fully utilizing the guiding support and positioning flange to position the beam assembly.

Description

Technical Field

[0001] The present invention relates to the field of fabrication of bridge steel structures, and particularly to a vertical assembly method for steel bridge components. Background Art

[0002] A horizontally opening bridge is a bridge whose superstructure can be opened and closed in ways such as vertical rotation, horizontal rotation, and lifting for navigation needs. Currently, some horizontally opening bridges do not use cable traction for support, but instead use cantilevers (herringbone structures) above the bridge deck to anchor two split parts. The cantilever is a variable cross-section box structure and includes three legs. The lower ends of the three legs are respectively fixedly connected to the bearings provided on the bridge deck, and the upper ends are fixedly connected to form a herringbone structure. However, currently, the high-altitude assembly of the lower opening of the cantilever and the bridge deck bearing is difficult, and the high-altitude operation risk and workload are relatively high. Summary of the Invention

[0003] In view of this, the present invention provides a vertical assembly method for steel bridge components that can reduce the high-altitude operation risk and workload and ensure the assembly accuracy.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The vertical assembly method for steel bridge components according to an embodiment of the present invention includes:

[0006] S100. After pre-assembling the first beam and the second beam into a beam assembly on the ground, hoist the beam assembly to the bridge deck installation position for rough positioning;

[0007] S200. After precisely trimming the margin at the lower port of the beam assembly based on the rough positioning assembly data, assemble the beam assembly and the bridge deck bearing in place;

[0008] S300. Pre-assemble the third beam and the beam assembly on the ground in advance;

[0009] S400. Hoist the third beam to the bridge deck and assemble it in place with the beam assembly and the bridge deck bearing.

[0010] In an embodiment of the present application, after pre-assembling the first beam and the second beam into a beam assembly on the ground, hoisting the beam assembly to the bridge deck installation position for rough positioning includes:

[0011] S110. Set a guiding stop block at the port of the bridge deck bearing corresponding to the beam assembly;

[0012] S120. Hoist the beam assembly to the bridge deck and complete rough positioning with the bridge deck bearing through the guiding stop block.

[0013] In an embodiment of the present application, after pre-assembling the first beam and the second beam into a beam assembly on the ground, hoisting the beam assembly to the bridge deck installation position for rough positioning further includes:

[0014] S130. Roughly trim the surplus at the lower port of the beam assembly.

[0015] In an embodiment of the present application, after finely trimming the surplus at the lower port of the beam assembly based on the rough positioning and assembly data, the beam assembly is assembled in place with the bridge deck bearing, including:

[0016] S210. Set measuring prisms at the lower port of the beam assembly and at the center point of the tower head of the beam assembly respectively;

[0017] S220. Measure the measuring prisms at the lower port of the beam assembly and at the center point of the tower head with the fixed point of the bridge deck box girder as the reference zero point to obtain the rough positioning and assembly data;

[0018] S230. Convert the rough positioning and assembly data into cross-section data corresponding to the beam assembly;

[0019] S240. Simulate the cross-section data through virtual pre-assembly to obtain the elevation positioning and fine trimming data of the lower port of the beam assembly. After finely trimming the surplus at the lower port of the beam assembly according to the fine trimming data, the beam assembly is assembled in place with the bridge deck bearing;

[0020] The center point of the tower head is the top connection center point where the first beam and the second beam are assembled.

[0021] In an embodiment of the present application, measuring the measuring prisms at the lower port of the beam assembly and at the center point of the tower head with the fixed point of the bridge deck box girder as the reference zero point includes:

[0022] S231. Use a total station to measure the measuring prisms at the lower port of the beam assembly and at the center point of the tower head respectively;

[0023] S232. Use a total station to receive the reflected data of the measuring prisms respectively to obtain the rough positioning and assembly data.

[0024] In an embodiment of the present application, pre-assembling the third beam and the beam assembly on the ground in advance includes:

[0025] S310. Lift the third beam to the ground and place it on the linear jig, and pre-assemble the third beam and the beam assembly based on the ground line;

[0026] S320. Adjust the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly;

[0027] S330. Adjust the web center line of the third beam to coincide with the web control line at the tower head of the beam assembly.

[0028] In an embodiment of the present application, adjusting the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly includes:

[0029] S321. Use a laser theodolite to measure the horizontal control line of the third beam and the horizontal control line at the tower head of the beam assembly respectively;

[0030] S322. Adjust the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly according to the laser.

[0031] In an embodiment of the present application, hoist the third beam onto the bridge deck and assemble it in place with the beam assembly and the bridge deck bearing, including:

[0032] S410. Install guiding supports and positioning flanges on both sides of the butt joint seam at the upper port of the third beam and the tower head of the beam assembly respectively;

[0033] S420. Assemble the third beam and the beam assembly in place through the guiding supports and the positioning flanges.

[0034] In an embodiment of the present application, assemble the third beam and the beam assembly in place through the guiding supports and the positioning flanges, including:

[0035] S421. Insert a through-pulling pin shaft into the guiding support, and control the rotation of the third beam through the through-pulling pin shaft until it fits with the upper port of the tower head of the beam assembly.

[0036] In an embodiment of the present application, hoist the third beam onto the bridge deck and assemble it in place with the beam assembly and the bridge deck bearing, further including:

[0037] S430. Set a positioning support at the port of the bridge deck bearing corresponding to the lower port of the third beam, and use the positioning support to fix the third beam;

[0038] S440. Set a filling section at the web of the lower port of the third beam.

[0039] At least one of the above technical solutions of the present invention has the following beneficial effects:

[0040] 1. For the vertical assembly method of the steel bridge beam assembly of the present invention, use a total station to measure the rough positioning and assembly data of the beam assembly, and simulate according to the rough positioning and assembly data to finely trim the allowance at the lower port of the beam assembly, effectively improving the installation accuracy and reducing the installation difficulty;

[0041] 2. For the vertical assembly method of the steel bridge beam assembly of the present invention, install guiding supports and positioning flanges on both sides of the butt joint seam at the upper port of the center points of the third beam and the tower head respectively, and use the fitting process of the guiding support and the positioning flange to splice the beam assembly, effectively reducing the bridge assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The flowchart showing the vertical assembly method of the steel bridge beam assembly according to the embodiment of the present invention is shown;

[0043] Figure 2 Shows the assembly schematic diagram of the beam assembly in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0044] Figure 3 Shows the structural schematic diagram of the measurement points on the beam assembly in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0045] Figure 4 Shows the schematic diagram of using a total station to measure the beam assembly in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0046] Figure 5 Shows the pre-assembly schematic diagram of the third beam and the beam assembly in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0047] Figure 6 Shows the schematic diagram of adjusting the pre-assembly control line of the third beam and the beam assembly in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0048] Figure 7 Shows the schematic diagram of hoisting the third beam in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0049] Figure 8 Shows the schematic diagram of the third beam and the tower head installation guiding support in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0050] Figure 9 Shows the schematic diagram of the third beam and the tower head fitting in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0051] Figure 10 Shows the schematic diagram of the third beam and the tower head positioning flange in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0052] Figure 11 Shows the schematic diagram of installing the positioning support at the lower port of the third beam in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0053] Figure 12 Shows the schematic diagram of the P-direction installation of the positioning support at the lower port of the third beam in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0054] Figure 13 Shows the schematic diagram of installing the inner sealing plate of the third beam in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0055] Figure 14 Shows the schematic diagram of removing the process support of the third beam in the vertical assembly method of the steel bridge component according to an embodiment of the present invention;

[0056] Figure 15 The figure shows a schematic diagram of installing the outer sealing plate of the third beam in the vertical assembly method of a steel bridge component according to an embodiment of the present invention.

[0057] Reference numerals: 100, the first beam; 110, the first bridge deck support; 120, the first measurement point; 200, the second beam; 210, the second bridge deck support; 220, the second measurement point; 300, the third beam; 301, the horizontal control line of the third beam; 302, the center line of the web of the third beam; 310, the third bridge deck support; 330, the guiding support; 331, the threading pin shaft; 340, the positioning flange; 350, the filling section; 360, the positioning support; 370, the sealing plate; 371, the process brace; 400, the center point of the tower head; 410, the third measurement point; 420, the reference zero point; 500, the total station; 600, the crane. Detailed implementation manners

[0058] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0059] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships will also change accordingly.

[0060] Currently, some horizontally opening bridges use cantilevers (herringbone structures) above the bridge deck to anchor two split sections. The cantilever is a variable cross-section box structure and includes three legs. The lower ends of the three legs are respectively fixedly connected to the supports provided on the bridge deck, and the upper ends are fixedly connected to form a herringbone structure. However, currently, the high-altitude assembly of the lower opening of the cantilever and the bridge deck support is difficult, and the high-altitude operation risks and workload are relatively high. To solve the above problems, the present application provides a vertical assembly method for steel bridge components, as Figure 2As shown, the first beam and the second beam can be pre-assembled and then installed on the first bridge deck support and the second bridge deck support. Wherein, a tower head is formed at the connection of the first beam and the second beam. Then, the third beam can be fixedly connected to the tower head and the third bridge deck support respectively to complete the assembly of the bridge.

[0061] The following specifically describes the vertical assembly method of the steel bridge component according to the embodiment of the present invention with reference to the accompanying drawings. As Figure 1 shown, Figure 1 is a flowchart of the vertical assembly method of the steel bridge component according to the embodiment of the present invention. The method includes:

[0062] S100. After pre-assembling the first beam and the second beam into a beam component on the ground, hoist the beam component to the bridge deck installation position for rough positioning.

[0063] In an embodiment of the present application, after pre-assembling the first beam 100 and the second beam 200 into a beam component on the ground, hoist the pre-assembled beam component to the bridge deck installation position for rough positioning, including:

[0064] S110. Set guiding blocks at the ports of the bridge deck supports corresponding to the beam component respectively;

[0065] S120. Hoist the beam component to the bridge deck and complete rough positioning with the bridge deck support respectively through the guiding blocks.

[0066] Specifically, as Figure 2 and 3 shown, the first beam and the second beam can be pre-assembled into a beam component on the ground, and guiding blocks are respectively set on the first bridge deck support 110 and the second bridge deck support 210. When hoisting the beam component onto the first bridge deck support 110 and the second bridge deck support 210, the guiding blocks can guide and support the beam component. Thus, rough positioning of the beam component with the first bridge deck support 110 and the second bridge deck support 210 can be completed.

[0067] In an embodiment of the present application, the vertical assembly method of the steel bridge component further includes:

[0068] S130. Roughly trim the surplus at the lower port of the beam component.

[0069] Specifically, after hoisting the beam component onto the first bridge deck support 110 and the second bridge deck support 210, the surplus at the lower port of the beam component can be roughly trimmed to complete the preliminary positioning of the lower port of the beam component with the first bridge deck support 110 and the second bridge deck support 210. Thus, a precondition for fine trimming is provided.

[0070] S200. After finely trimming the surplus at the lower port of the beam component based on the rough positioning assembly data, assemble the beam component with the bridge deck support in place.

[0071] In one embodiment of the present application, after the lower port margin of the beam assembly is finely trimmed based on the rough positioning assembly data, the beam assembly and the bridge deck support are assembled in place, including:

[0072] S210, respectively setting measuring prisms at the lower port of the beam assembly and the center point of the tower head of the beam assembly;

[0073] S220, taking the fixed point of the bridge deck box girder as the reference zero point, measuring the measuring prism at the lower port of the beam assembly and the center point of the tower head to obtain rough positioning assembly data;

[0074] S230, converting the rough positioning assembly data into cross-sectional data corresponding to the beam assembly;

[0075] S240, simulating the cross-section data through virtual pre-assembly to obtain the elevation positioning of the beam component and the fine trimming data of the lower port, fine trimming the lower port margin of the beam component according to the fine trimming data, and assembling the beam component and the bridge deck support in place;

[0076] The center point of the tower head is the center point of the top connection of the first beam and the second beam.

[0077] Specifically, if Figure 3 and Figure 4 As shown, a measuring prism can be set at the first measuring point 120 at the lower end of the first beam 100, the second measuring point 220 at the lower end of the second beam 200, and the third measuring point 410 at the connection point of the beam assembly, i.e., the center point 400 of the tower head, and a reference zero point 420 can be set. The measuring prism is measured by a total station 500, and rough positioning assembly data is obtained according to the reflection data. The building simulation software is used for virtual pre-assembly to display the on-site assembly situation, and guide the on-site adjustment of the beam assembly elevation and various installation data. After the various installation data are adjusted in place, the Cartesian coordinate system is used to calculate the fine trimming data of the lower end of the beam assembly according to the total station re-measurement data for fine trimming.

[0078] In one embodiment of the present application, the measurement prism at the lower port of the beam assembly and the connection point of the beam assembly is measured with the fixed point of the bridge deck box beam as the reference zero point, including:

[0079] S231. Use a total station to measure the lower port of the beam assembly and the measuring prism at the center point of the tower head respectively;

[0080] S232. Use a total station to receive and measure prism reflection data to obtain coarse positioning assembly data.

[0081] Specifically, if Figure 3 and Figure 4As shown, measurement prisms can be respectively set at the first measurement point 120 at the lower port of the first beam 100, the second measurement point 220 at the lower port of the second beam 200, and the connection point of the beam assembly, i.e., the tower head center point 400, and a reference zero point 420 is set. A total station 500 is used to measure the measurement prisms to obtain rough positioning assembly data. The total station 500 can accurately measure data at a long distance, quickly and accurately obtain the rough positioning assembly data, and perform fine trimming according to the rough positioning assembly data, reducing the positioning and installation difficulty of the beam assembly.

[0082] S300. Pre-assemble the third beam and the beam assembly on the ground in advance.

[0083] In an embodiment of the present application, pre-assembling the third beam and the beam assembly on the ground in advance includes:

[0084] S310. Lift the third beam to the ground and place it on the linear jig, and pre-assemble the third beam and the beam assembly based on the ground line.

[0085] S320. Adjust the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly.

[0086] S330. Adjust the center line of the web of the third beam to coincide with the web control line at the tower head of the beam assembly.

[0087] As Figure 5 and Figure 6 shown, after lifting the third beam 300 to the installation position and placing it on the linear jig, pre-assemble the third beam 300 and the beam assembly based on the ground line, and adjust the horizontal control line 301 of the third beam to coincide with the horizontal control line at the tower head of the beam assembly so that the third beam 300 is in the same plane as the first beam 100 and the second beam assembly. Then, the center line 302 of the web of the third beam can be adjusted to coincide with the web control line at the tower head of the beam assembly so that the third beam 300 is centrosymmetric with the first beam 100 and the second beam assembly.

[0088] In an embodiment of the present application, adjusting the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly includes:

[0089] S321. Use a laser theodolite to respectively laser-measure the horizontal control line of the third beam and the horizontal control line at the tower head of the beam assembly.

[0090] S322. Adjust the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly according to the laser.

[0091] Specifically, as Figure 6As shown, a laser theodolite can be set on the third beam 300 to measure the third beam 300 and the center of the tower head, so that the horizontal control line 301 of the third beam coincides with the horizontal control line at the tower head of the beam assembly, and the elevations of each control point of the box body are controlled, so that the third beam 300 is in the same plane as the first beam 100 and the second beam assembly. Thus, the docking accuracy between the third beam 300 and the first beam 100 and the second beam assembly is improved, and the installation difficulty of the third beam 300 is reduced.

[0092] S400. Assemble the third beam, the beam assembly and the bridge deck support in place.

[0093] Specifically, as Figure 7 shown, when hoisting the third beam 300, two groups of hoisting machines 600 can be used to hoist the third beam 300 to the bridge deck. More specifically, the hoisting cables of one group of hoisting machines 600 can be respectively fixed to the upper end face and the side end face of the third beam 300, and the hoisting cables of the other group of hoisting machines 600 can be respectively fixed to the upper end face and the other side end face of the third beam 300 to fully lift the third beam 300. Thus, the stability during hoisting can be improved, and the safety is enhanced.

[0094] In an embodiment of the present application, assembling the third beam and the beam assembly in place includes:

[0095] S410. Install guide supports and positioning flanges on both sides of the butt joint seam at the upper port of the tower head of the third beam and the beam assembly.

[0096] Specifically, as Figure 8 and Figure 9 shown, the guide support 330 is installed at the upper end of the butt joint seam between the third beam and the tower head of the beam assembly, and is used to thread a pin shaft 331 through the guide support 330 so that the third beam 300 rotates around the threaded pin shaft 331. Thus, the slope of the third beam 300 can be adjusted, and the third beam is spliced with the tower head installation guide support, further improving the installation accuracy and reducing the installation difficulty. In addition, the positioning flanges 340 are respectively arranged at the lower end of the butt joint seam between the third beam and the tower head of the beam assembly, and are used to position and fix the third beam 300.

[0097] S420. Assemble the third beam and the beam assembly in place through the guide support and the positioning flange.

[0098] In an embodiment of the present application, assembling the third beam and the beam assembly in place through the guide support and the positioning flange includes:

[0099] S421. Insert a pin shaft through the guide support, and control the rotation of the third beam through the pin shaft until it fits with the upper port of the tower head of the beam assembly.

[0100] Specifically, as Figure 8 、 Figure 9 and Figure 10As shown, after the guiding support 330 is inserted with the threading pin 331, the third beam 300 can be controlled by the threading pin 331 to rotate until it fits with the docking seam of the tower head of the beam assembly, and the positioning flange 340 is used for fixation. Thus, the positioning and fixation of the upper port of the third beam 300 are completed.

[0101] In an embodiment of the present application, when assembling the third beam and the beam assembly in place, it further includes:

[0102] S430. Set a positioning support at the bridge deck support port corresponding to the lower port of the third beam, and use the positioning support to fix the third beam.

[0103] Specifically, as Figure 11 and Figure 12 shown, after the upper end of the third beam 300 is fixed, the lower port is in a floating state. Therefore, a positioning support 360 can be set at the port of the third bridge deck support 310 to position the lower port of the third beam 300 and support the third beam 300. Thus, by positioning and supporting the third beam 300 through the positioning support 360, the safety of bridge assembly is improved.

[0104] S440. Set a filling section at the web of the lower port of the third beam.

[0105] Specifically, as Figures 12 - 15 shown, during the installation process, due to factors such as manufacturing precision and cumulative error, the lower port of the third beam 300 cannot completely fit with the port of the third bridge deck support 310. At this time, a filling section 350 can be added between the lower port of the third beam 300 and the port of the third bridge deck support 310 to fixedly connect the lower port of the third beam 300 and the port of the third bridge deck support 310 through the filling section 350. After the fixation is completed, the temporary process brace 371 on the third bridge deck support 310 is removed, and the third bridge deck support 310 is reinforced and sealed on the inner and outer sides with the sealing plate 370 to complete the installation of the third beam 300 and the third bridge deck support 310.

[0106] The vertical assembly method of the steel bridge component of the present invention measures the rough positioning and assembly data of the beam component using a total station instrument, and simulates according to the rough positioning and assembly data to precisely trim the allowance of the lower port of the beam component, effectively improving the installation accuracy and reducing the installation difficulty; in addition, in the vertical assembly method of the steel bridge component of the present invention, a guiding support and a positioning flange are respectively installed on both sides of the docking seam at the upper port of the center points of the third beam and the tower head, and the guiding support and the positioning flange fitting process are used to splice the beam component, further reducing the bridge assembly difficulty.

[0107] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A vertical assembly method for steel bridge components, characterized in that, Including: S100. After pre-assembling the first beam and the second beam into a beam assembly on the ground, hoist the beam assembly to the bridge deck installation position for rough positioning. S200. After precisely trimming the lower port margin of the beam assembly based on the rough positioning assembly data, assemble the beam assembly and the bridge deck bearing in place. S300. Pre-assemble the third beam and the beam assembly on the ground in advance. S400. Hoist the third beam to the bridge deck and assemble it in place with the beam assembly and the bridge deck bearing. The S100 includes: S110. Set a guiding stop block at the port of the bridge deck bearing corresponding to the beam assembly. S120. Hoist the beam assembly to the bridge deck and complete rough positioning with the bridge deck bearing through the guiding stop block. S130. Roughly trim the lower port margin of the beam assembly. The S200 includes; S210. Respectively set measuring prisms at the lower port of the beam assembly and at the center point of the tower head of the beam assembly. S220. Taking the fixed point of the bridge deck box girder as the reference zero point, measure the measuring prisms at the lower port of the beam assembly and at the center point of the tower head to obtain rough positioning assembly data. S230. Convert the rough positioning assembly data into sectional data corresponding to the beam assembly. S240. Through virtual pre-assembly, simulate the sectional data to obtain the elevation positioning and lower port precise trimming data of the beam assembly. After precisely trimming the lower port margin of the beam assembly according to the precise trimming data, assemble the beam assembly and the bridge deck bearing in place. The center point of the tower head is the top connection center point of the assembly of the first beam and the second beam. The S400 includes: S410. Respectively install guiding bearings and positioning flanges on both sides of the butt joint seam at the upper port of the third beam and the tower head of the beam assembly. S420. Assemble the third beam and the beam assembly in place through the guiding bearings and the positioning flanges. S430. Set a positioning support at the port of the bridge deck bearing corresponding to the lower port of the third beam and fix the third beam with the positioning support. S440. Set a patching section at the web of the lower port of the third beam.

2. The vertical assembly method of the steel bridge component according to claim 1, characterized in that, Taking the fixed point of the bridge deck box girder as the reference zero point to measure the measuring prisms at the lower port of the beam assembly and at the center point of the tower head includes: S231. Use a total station to measure the measuring prisms at the lower port of the beam assembly and at the center point of the tower head respectively. S232. Use a total station to receive the reflected data of the measuring prisms respectively to obtain rough positioning assembly data.

3. The vertical assembly method of the steel bridge component according to claim 1, characterized in that The pre-assembling the third beam and the beam assembly on the ground in advance includes: S310. After hoisting the third beam to the ground, place it on a linear jig and pre-assemble the third beam and the beam assembly based on the ground line. S320. Adjust the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly. S330. Adjust the web center line of the third beam to coincide with the web control line at the tower head of the beam assembly.

4. The vertical assembly method of the steel bridge component according to claim 3, characterized in that The adjusting the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly includes: S321. Use a laser theodolite to measure the horizontal control line of the third beam and the horizontal control line at the tower head of the beam assembly respectively. S322. Adjust the horizontal control line of the third beam to coincide with the horizontal control line at the tower head of the beam assembly according to the laser.

5. The vertical assembly method of the steel bridge component according to claim 1, characterized in that, The step of assembling the third beam and the beam assembly in place through the guide support and the positioning flange includes: S421. Insert a through-pulling pin shaft into the guide support, and control the rotation of the third beam to fit with the upper port of the tower head of the beam assembly through the through-pulling pin shaft.

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